SENECA
South Dakota — Community Water System — PWSID: SD4600292
System Information
| PWSID | SD4600292 |
| System Name | SENECA |
| System Type | Community Water System |
| Water Source | Surface Water Purchased |
| Activity Status | Active |
| Owner Type | Local |
| EPA Region | 08 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Feb 13, 1979 |
| Last Reported | Dec 9, 2025 |
Location & Contact
| State | South Dakota |
| City | SENECA |
| ZIP Code | 57473 |
| Address | 504 LINN STREET |
| Organization | SENECA |
| Phone | 6054366236 |
Population & Service
| Population Served | 25 |
| Service Connections | 20 |
Drinking Water Violations (23)
This water system has 23 violations recorded in the EPA SDWIS database.
| Begin Date | End Date | Contaminant | Category | Health-Based | Major | Measured | Federal MCL | State MCL | Status | Return to Compliance | Rule |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Feb 1, 2018 | — | Stage 1 Disinfectants and Disinfection Byproducts Rule | TT | Yes | No | — | — | — | Resolved | Jun 11, 2018 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Feb 1, 2018 | — | Stage 1 Disinfectants and Disinfection Byproducts Rule | TT | Yes | No | — | — | — | Resolved | Jun 11, 2018 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Feb 1, 2016 | — | Stage 1 Disinfectants and Disinfection Byproducts Rule | TT | Yes | No | — | — | — | Resolved | May 19, 2016 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Feb 1, 2016 | — | Stage 1 Disinfectants and Disinfection Byproducts Rule | TT | Yes | No | — | — | — | Resolved | May 19, 2016 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Feb 1, 2014 | — | Stage 1 Disinfectants and Disinfection Byproducts Rule | TT | Yes | No | — | — | — | Resolved | Jun 30, 2014 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Feb 1, 2011 | — | Stage 1 Disinfectants and Disinfection Byproducts Rule | TT | Yes | No | — | — | — | Resolved | Mar 8, 2011 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Feb 1, 2011 | — | Stage 1 Disinfectants and Disinfection Byproducts Rule | TT | Yes | No | — | — | — | Resolved | Mar 8, 2011 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Aug 9, 2010 | — | Other | No | No | — | — | — | Resolved | Jun 23, 2011 | Ground Water Rule | |
| Aug 9, 2010 | — | Other | No | No | — | — | — | Resolved | Jun 23, 2011 | Ground Water Rule | |
| Aug 1, 2010 | Aug 31, 2010 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Aug 31, 2010 | Total Coliform Rule |
| Aug 1, 2010 | Aug 31, 2010 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Aug 31, 2010 | Total Coliform Rule |
| Aug 1, 2010 | Aug 31, 2010 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Aug 31, 2010 | Total Coliform Rule |
| Aug 1, 2010 | Aug 31, 2010 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Aug 31, 2010 | Total Coliform Rule |
| Jul 1, 2010 | Sep 30, 2010 | Chlorine | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Sep 30, 2010 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Jul 1, 2010 | Sep 30, 2010 | Chlorine | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Sep 30, 2010 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Jul 1, 2010 | Sep 30, 2010 | Chlorine | MR | No | Yes | — | 4.0 mg/L | — | Resolved | Sep 30, 2010 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Jan 1, 1995 | Nov 13, 1995 | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Nov 13, 1995 | Lead and Copper Rule |
| Oct 1, 1994 | Oct 31, 1994 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Oct 31, 1994 | Total Coliform Rule |
| Oct 1, 1994 | Oct 31, 1994 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Oct 31, 1994 | Total Coliform Rule |
| Jan 1, 1994 | Nov 13, 1995 | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Nov 13, 1995 | Lead and Copper Rule |
| Sep 1, 1991 | Sep 30, 1991 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Sep 30, 1991 | Total Coliform Rule |
| Jul 1, 1976 | Jun 30, 1980 | Combined Radium (-226 and -228) | MR | No | No | — | 5 pCi/L | — | Archived | Jun 30, 1980 | Radionuclides and Revised Rad Rule |
| Jul 1, 1976 | Jun 30, 1980 | Gross Alpha, Excl. Radon and U | MR | No | No | — | 15 pCi/L | — | Archived | Jun 30, 1980 | Radionuclides and Revised Rad Rule |
About This Water System
Public water system data comes from the EPA Safe Drinking Water Information System (SDWIS). Systems with violations must notify customers. Contact your water utility for the latest annual water quality report.